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A robin is freed in a remote area of St. Casimir Cemetery in Alsip,... News PhotoGeographical Locations,Healthcare And Medicine,Horizontal,Illinois,USAPhotographer Collection: Tribune News Service A robin is freed in a remote area of St. Casimir Cemetery in Alsip, Illinois, July 30, 2009. The bird's blood and notes recorded about its appearance and condition are part of a research project to determine why West Nile virus and other mosquito-borne diseases are prevalent in the suburbs south of Chicago. (Photo by David Pierini/Chicago Tribune/MCT via Getty Images)